The extent to which your horse builds up its immunity depends on birth. Foals are born without antibodies and have not yet built up any resistance. These antibodies are important for building immunity and are passed on through the mare’s milk after birth. Depending on the pathogens that a young horse comes into contact with, the production of antibodies is stimulated. The resistance is determined by the immune system with the aim of forming a defense mechanism against viruses, bacteria, and infections. The immune system ensures that waste products are removed faster and that your horse can better protect itself against external influences.